Caddies are expected to do four things. You know three: Show up, keep up and shut up (unless you're Jim Mackay, then you're invited to chirp up). The fourth? According to Rory McIlroy: Don't fall asleep on the private jet.
McIlroy and his team were flying from the Deutsche Bank Championship when the world No. 1 noticed caddie J.P. Fitzgerald had fallen asleep. McIlroy didn't waste the opportunity to pull a fast one on his long-time looper, waking him suddenly. Fitzgerald's reaction is priceless.